Engineering Board Exam Reviewer · Trigonometric Identities · hard
If x= 12 and y= 13, with x and y acute, find x+y in degrees.
- 39.81°
- 56.31°
- 63.43°
- 45°
Answer
D. 45°
Solution
(x+y)= 12+ 13/1- 12· 13=5/6/5/6=1, so x+y=45°.
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